WordReference Random House Unabridged Dictionary of American English © 2026
pro•to•lan•guage
(prō′tō lang′gwij),USA pronunciation n. [Ling.]
- Linguisticsthe reconstructed or postulated parent form of a language or a group of related languages.
- proto- + language 1945–50
'protolanguage' also found in these entries (note: many are not synonyms or translations):